Liquid Graffix
liquidgraffix
- Location
- In the shop or on the water
This thread and the one on PWC are what got me inspired to do my 300 build. Well.... these AND the fact that I can't afford a BOB...
Freestyle 300 SX build FINISHED!
- Thread starter Brian_216
- Start date
- Location
- Harveys Lake PA
Its been some time since I looked at this. Got everything in my basement where I can get to it easily and put some real hours into it. Trim the drive shaft, re thread and then its mock up time. Im not sure what I will do as far as glassing in something for motor mounts. looks like I will need 1.5" thick bar stock to glass in for the mounts to sit on. I will also glass in some 1x1 x .5" squares to drill and tap for battery, waterbox and gas tank hold downs. once thats done I will lay the orange and black kevlar all over the inside.
Liquid Graffix
liquidgraffix
- Location
- In the shop or on the water
How much weight will that add?
- Location
- Harveys Lake PA
not sure, it will be aluminum. so it will be minimal. a necessary evil. I want the motor to stay put. I didnt grind out the 300 sx mount points yet. I may bolt 1/4 inch plate to them, bed the underside with glass, nuts and bolts. (flush mount allen head bolts) then just bolt whatever thickness risers on that for the final pads for the mounts to sit on.
Liquid Graffix
liquidgraffix
- Location
- In the shop or on the water
In another build we did, we just made aluminum pieces that bolted to the original mounting points, then taped and threaded them to accept the new motor mounts in the position we needed. Didn't have to glass anything.
- Location
- Harveys Lake PA
-thats what was in this one when I got it, I think the guy had a 650 motor in it. Could work, but the rear mounts will have nothing under the plate where they will bolt. it will be hanging back about 6 inches from the 300 mount in the hull, unless I set the motor forward more. I was only thinking of fitting a gas tank in there when picking how far back the motor will sit. I really want to run a stock RN tank in it. anybody got one to part with?
Liquid Graffix
liquidgraffix
- Location
- In the shop or on the water
I mocked everything up in mine and a RN water box and gas tank fit just fine. You should be able to squeeze one in with no trouble. Or use a 550 tank.
- Location
- Brentwood CA
just out of curiosity, why do you build the 300 sx's... are they lighter. why not the 650 or 750?
Liquid Graffix
liquidgraffix
- Location
- In the shop or on the water
Cuz I can't afford a BOB!
- Location
- Brentwood CA
ya but out of all the cheap skis to build... why the 300 sx? any specific reason other than there cheap? hahah sorry to bug you. im kindof a noob...
Liquid Graffix
liquidgraffix
- Location
- In the shop or on the water
yes, yes, yes, yes, ...but only if you can get your hands on one. The are getting harder and harder to find these days.
- Location
- Harveys Lake PA
Did some mockup this morning. Im really considering keeping the driveshaft at the stock 750sx length. I used some aluminum bars that came with my 300 from the last owner that had a bigger kawi motor in it. Looks like I need 3/4 thick x 3 wide and 16 long bars to bolt to the stock motor mount bosses in the hull. Im about to order aluminum today. My only issue is what alloy to use to hold threads best? 6061 or 7075? Or do I get the ss nuts that hold the pump in and glass them in behind the aluminum bars? My other thought was go longer with the bars, and run them back closer to the bulkhead so I would have the option down the road to run a shorter shaft and easly set the motor back further if I wanted to. Also keeping in mind battery placement, fuel tank, exhaust and waterbox. (none of which I have yet) Im thinking of a 4lb bulkhead mounted battery this would save space up front.
Liquid Graffix
liquidgraffix
- Location
- In the shop or on the water
The metal plates we used on another 300 project were 1/2" thick. We bolted them to the original mount holes and tapped new ones where we wanted the motor to sit.
- Location
- Harveys Lake PA
thats what Im doing, going to bolt them to the stock mounts in the hull. only issue I have is there wont be anything under the plate for about 6 inches rear of where the stock ones are molded into the hull. I want to bolt them in, mark it out and build a dam with tape so I can pour it solid under the whole plate. I dont trust the 300 hull, its so brittle. All this thing has to do is land upside down once and tear the mounts apart. Im taking it further and making something solid for the plates to sit on and bolt to along with whats already there. then after that the whole inside will be laminated with carbon/ kevlar
- Location
- Harveys Lake PA
I ordered my aluminum bar stock, went with 6061. Now to find a b pipe, decide on a gas tank and do a ton of other stuff. Stay tuned.
Oh, I also ordered something from USC called "All Resin" bonds to SMC and fiberglass. 50 bucks for a gallon.
Oh, I also ordered something from USC called "All Resin" bonds to SMC and fiberglass. 50 bucks for a gallon.
- Location
- Harveys Lake PA
Resin is here, aluminum is due tomorrow. Stay tuned for pics this weekend.
- Location
- Harveys Lake PA
I got a bunch of cool stuff, and more on the way. I got my metal plates and ss allen head countersunk m8x1.25x35 bolts to mount them to the hull. Also I finally found a b pipe and bought it before it was gone. This weekend I would like to have the motor bolted down. Next I will need some help finding a fuel tank thats going to work. I may call on someone to get me measurements on a RN tank.
Liquid Graffix
liquidgraffix
- Location
- In the shop or on the water
Not sure where you've positioned your motor, but in the mock up of my ski I was able to fit the RN gas tank and water box in there with no problems.